ASTROSAT CZTI

Data Quality Report

Orbit 20211110_A11_030T01_9000004760_level2

Creation date: 2021-11-13T11:05:21.188605
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A11_030T01_9000004760cztM0_level2_bc.evt modeM0/AS1A11_030T01_9000004760cztM0_level2_quad_clean.evt
Size (bytes)4,117,299,840595,863,360
Size3.8 GB 568.3 MB
Events in quadrant A9,583,8344,202,884
Events in quadrant B12,709,2824,204,265
Events in quadrant C22,026,1883,770,097
Events in quadrant D77,338,3632,788,473

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01870
B01870
C01870
D01870

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0911840
B01054510
C01510860
D02987680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09160
B09160
C09160
D09160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A44757520.116183%
B4475715843.539111%
C44757650514.534039%
D447572546256.889425%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 63104 44759 0 0 0.00% 0.00%
B 63104 44756 42 42 0.07% 0.09%
C 63104 44757 630 630 1.00% 1.41%
D 63104 44755 20173 20173 31.97% 45.07%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 13 254 77084 139.86 2450 2413 533.9
A 15 169 62687 112.89 2450 2413 533.9
A 13 6 43613 77.17 2450 2413 533.9
B 5 172 2379199 4996.43 2439 2390 475.7
B 5 200 213661 444.13 2439 2390 475.7
B 0 189 178692 370.61 2439 2390 475.7
C 8 111 6653864 13423.11 2190 2176 495.5
C 1 23 2990276 6029.99 2190 2176 495.5
C 7 221 1650877 3327.08 2190 2176 495.5
D 7 223 57999794 116210.55 1857 1820 499.1
D 8 195 6442348 12904.89 1857 1820 499.1
D 2 250 1378788 2759.03 1857 1820 499.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter